"This war heroine is being too conceited, so that's what we'll do to take her down a peg. We'll sabotage the defense of our nation giving to the enemy not only a prosperous territory, but a natural stronghold against foreign invasions, turning it in a great outpost to invade us.
Because we are...
@Robbini
This.
Train him in espionage/infiltration.
Send him with a male-only squad behind enemy lines.
Have him turn high ranked female enemies and set a spy network. Or a team of assassins above suspicion.